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US 4,525,308 AGranted
Hydroxy-t-alkyl peroxyesters
AssigneePennwalt Corporation
InventorJose Sanchez
Life of this patent
Estimating the term…
Abstract
Hydroxy-t-akyl peroxyesters having the general structure ##STR1## where R,R.sub.1, R.sub.2, R.sub.3 and R.sub.4 can be alkyl moieties and having 10 hour half-life temperatures below about 75.degree. C. (for example, 3-hydroxy-1,1-dimethylbutyl peroxyneodecanoate) are used as initiators for vinyl monomer polymerization and as catalysts for curing unsaturated polyester resins in order to improve the efficiency of the systems.
Claims3
A hydroxy-t-alkyl peroxyester of the structure ##STR6## having a ten hour half-life temperature below about 75.degree. C., where R.sub.1 and R.sub.2 are selected from an alkyl of 1 to 4 carbons,
- R.sub.3 and R.sub.4 are selected from hydrogen of an alkyl of 1 to 4 carbons,
- R.sub.1 and R.sub.3 can be connected together to form a lower alkyl substituted 3 carbon atom alkylene bridge and R.sub.3 can additionally be ##STR7## and R is selected from ##STR8## where R.sub.5 is selected from hydrogen or an alkyl of 1 to 8 carbons,
- R.sub.6 is selected from alkyl of 1 to 8 carbons,
- R.sub.7 is selected from the group consisting of an alkyl of 1 to 8 carbons, an alkenyl of 1 to 8 carbons, a hydrocarbyl aryl of 6 to 10 carbons, an alkoxy of 1 to 6 carbons and a hydrocarbyl aryloxy of 6 to 10 carbons, and
- R.sub.8 and R.sub.9 are selected from an alkyl of 1 to 4 carbons.
2 more elements
Dependencies are inferred from the claim text.